Control method and device for reducing yarn breakage of spinning frame

Abstract

The invention discloses a control method used for reducing broken yarn ends of a spinning machine. The control method comprises a starting step, a small yarn spinning step, a middle yarn spinning step, a large yarn spinning step and a yarn discharge step. The starting step is that a fan is started, a steel collar plate simultaneously moves upwards to the initial spinning position when the fan is started, then the steel collar plate can continue moving upwards from the initial spinning position, the steel collar plate moves upwards to the appropriate place spinning position, then a main motor begins to run at low speed, and the steel collar plate can move downwards from the appropriate place spinning position to the initial spinning position to run at low speed to spin. If running time is equal to Pd, the middle yarn spinning step begins, the steel collar plate can move upwards to the appropriate place spinning position and then moves downwards from the appropriate place spinning position to the initial spinning position, an air ring is opened timely, wavelength of the air ring is shortened, yarn tension is reduced, and broken yarn end rate in spinning small yarns is remarkably reduced. A steel collar plate motor can be protected, and running time of the steel collar plate motor can be arranged 5 seconds after the fan is started. If an initial spinning position sensor is in fault, the steel collar plate motor moves upwards 5 seconds at most to be stopped.

Description

technical field

[0001] The invention relates to a control method for the spinning process of a spinning frame, which is suitable for the spinning frame, in particular to a control method and a device for reducing yarn breakage of the spinning frame, and belongs to the technical field of textiles. Background technique

[0002] In the textile industry, the spinning frame is usually used to spin on the bobbin 1, and reducing the breakage rate of the spinning frame during spinning is the goal that the industry has been pursuing. Traditional equipment still in use in the market, such as FA502, FA503 and A513, etc., mainly use AC contactors to control the spinning process of the entire spinning frame. control. In order to reduce the yarn breakage rate of the spinning frame, at present, frequency converters are generally used to control it. However, due to the large number of old spinning frames mentioned above in the textile industry, these spinning frames are transformed. The fr...

Images